An Electrostatic Discharge (ESD) protection circuit (9) includes a plurality of I/O and power supply pad cells (22, 40) that comprise external pads (31, 41) and circuitry requiring ESD protection. The protection circuit includes an array of shunting devices (36, 46) coupled in parallel between an ESD...http://www.google.com/patents/US6724603?utm_source=gb-gplus-sharePatent US6724603 - Electrostatic discharge protection circuitry and method of operation
